bolt nut fitting
螺栓螺母配件
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The main reasons for the failure of thread pair during fitting process is analyzed in this paper. Thus the fitting quality of bolt and nut can been increased.
从理论上、实践上分析了螺纹副在装配过程中失效的主要因素，从而达到提高螺栓、螺母的装配质量。
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